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Myotonia is the defining symptom of many channelopathies (diseases of ion channel transport) such as myotonia congenita, paramyotonia congenita and myotonic dystrophy. [3] [4] Brody disease (a disease of ion pump transport) has symptoms similar to myotonia congenita, however, the delayed muscle relaxation is pseudo-myotonia as the EMG is normal ...
Myotonia congenita is a congenital neuromuscular channelopathy that affects skeletal muscles (muscles used for movement). It is a genetic disorder.The hallmark of the disease is the failure of initiated contraction to terminate, often referred to as delayed relaxation of the muscles and rigidity. [1]
NMT is a diverse disorder. As a result of muscular hyperactivity, patients may present with muscle cramps, stiffness, myotonia-like symptoms (slow relaxation), associated walking difficulties, hyperhidrosis (excessive sweating), myokymia (quivering of a muscle), fasciculations (muscle twitching), fatigue, exercise intolerance, myoclonic jerks and other related symptoms.
Myotonic dystrophy (DM) is a type of muscular dystrophy, a group of genetic disorders that cause progressive muscle loss and weakness. [1] In DM, muscles are often unable to relax after contraction. [ 1 ]
Schwartz–Jampel syndrome (SJS, also known as chondrodystrophic myotonia) is a rare genetic disease caused by a mutation in the perlecan gene (HSPG2) [1] which causes osteochondrodysplasia associated with myotonia. [2] Most people with Schwartz–Jampel syndrome have a nearly normal life expectancy. [3]
Symptoms include stiffness [1] and sometimes muscle cramping [4] after exercise (pseudo-myotonia) [5] and especially when exposed to cold. The most commonly affected muscles are in the arms, legs, and eyelids. [1] [4] Individuals with Brody myopathy also sometimes experience weakness, [4] myalgia, and rhabdomyolysis. [1]
Diabetes Symptoms. Symptoms of diabetes tend to get worse the more the condition progresses without treatment. Some of the signs and symptoms include: Frequent urination. Persistent thirst ...
Some patients do not require treatment to manage the symptoms of paramyotonia congenita. Others require treatment for their muscle stiffness and often find mexiletine to be helpful. Others have found acetazolamide to be helpful as well. [34] Avoidance of myotonia triggering events is also an effective method of myotonia prevention. [citation ...